What Grade Do I Need on My Final?

Required final score = (target grade − current grade × (1 − final weight)) ÷ final weight, with weight expressed as a decimal.

If the required score comes out above 100%, the target grade isn't reachable even with a perfect score on the final — you'd need to have entered the final with a higher current grade.

If the required score is 0% or negative, you've already secured your target grade regardless of how you do on the final.